Quote Originally Posted by Fredrick View Post
The datasheet says this
...
Does that mean that I can feed +9 into RA4?
And if not why should this be avoided?

Absolute maximum means it's the limit, at your own risk, no guarantees. Avoid unless you like magic smoke tricks.

Check the other section where it says recommended or something (can't remember exact words), but it'll most likely have a range of 0 to 5 volts or so.

Robert


Edit: check up voltage dividers.